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Finding the Fourth Proportional to 940.13, 1,297.48 and 520.51

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Solution

The fourth proportional to 940.13, 1,297.48 and 520.51 is: 718.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    940.13 : 1,297.48 = 520.51 : x
  2. Step 2: Convert to fraction form
    940.13/1,297.48 = 520.51/x
  3. Step 3: Cross multiply
    940.13x = 1,297.48 × 520.51
  4. Step 4: Simplify right side
    940.13x = 675,351.31
  5. Step 5: Solve for x
    x = 675,351.31/940.13
  6. Step 6: Final answer
    x = 718.36

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.